:root{
  --bg:#0f1220;
  --card:#1a1e33;
  --accent:#6c8cff;
  --accent2:#ff6c8c;
  --good:#3ddc97;
  --bad:#ff5c6c;
  --text:#f2f3f8;
  --muted:#9aa0c0;
}
*{box-sizing:border-box;}
html,body{
  margin:0;padding:0;min-height:100%;
  background:radial-gradient(circle at 20% -10%, #262c52 0%, var(--bg) 55%);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
a{color:inherit;}
.wrap{
  min-height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:24px 16px 60px;
}
.back-link{
  width:100%;
  max-width:520px;
  margin-bottom:10px;
  font-size:.85rem;
  color:var(--muted);
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.back-link:hover{color:var(--accent);}
header.app-header{
  width:100%;
  max-width:520px;
  text-align:center;
  margin-bottom:18px;
}
header.app-header h1{
  font-size:1.5rem;
  margin:0 0 4px;
  letter-spacing:.5px;
}
header.app-header h1 span{color:var(--accent);}
header.app-header p{
  margin:0;
  color:var(--muted);
  font-size:.9rem;
}
.stats{
  display:flex;
  gap:10px;
  width:100%;
  max-width:520px;
  margin-bottom:16px;
}
.stat{
  flex:1;
  background:var(--card);
  border-radius:14px;
  padding:10px 8px;
  text-align:center;
}
.stat b{display:block;font-size:1.25rem;}
.stat span{
  font-size:.72rem;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.5px;
}
.level-bar{
  display:flex;
  gap:8px;
  width:100%;
  max-width:520px;
  margin-bottom:16px;
  flex-wrap:wrap;
}
.level-chip{
  flex:1;
  min-width:70px;
  text-align:center;
  padding:9px 6px;
  border-radius:12px;
  background:var(--card);
  color:var(--muted);
  font-size:.78rem;
  font-weight:600;
  cursor:pointer;
  border:2px solid transparent;
  transition:.15s;
  user-select:none;
}
.level-chip.active{
  color:#fff;
  border-color:var(--accent);
  background:linear-gradient(135deg,var(--accent),#4a63d6);
}
.card{
  width:100%;
  max-width:520px;
  background:var(--card);
  border-radius:22px;
  padding:28px 22px;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.prompt-label{
  text-align:center;
  color:var(--muted);
  font-size:.8rem;
  text-transform:uppercase;
  letter-spacing:1px;
  margin-bottom:6px;
}
.prompt{
  text-align:center;
  font-size:2.1rem;
  font-weight:700;
  margin-bottom:6px;
  color:var(--accent);
  word-break:break-word;
}
.prompt-sub{
  text-align:center;
  color:var(--muted);
  font-size:.85rem;
  margin-bottom:22px;
}
.field{margin-bottom:14px;}
.field label{
  display:block;
  font-size:.82rem;
  color:var(--muted);
  margin-bottom:6px;
}
.field input, .field select{
  width:100%;
  padding:13px 14px;
  border-radius:12px;
  border:2px solid #2c3156;
  background:#12162a;
  color:var(--text);
  font-size:1rem;
  outline:none;
  transition:border-color .15s;
  font-family:inherit;
}
.field input:focus, .field select:focus{border-color:var(--accent);}
.field input.correct{border-color:var(--good);background:rgba(61,220,151,.08);}
.field input.wrong{border-color:var(--bad);background:rgba(255,92,108,.08);}
.answer-reveal{
  margin-top:6px;
  font-size:.85rem;
  color:var(--good);
  display:none;
}
.answer-reveal.show{display:block;}
.choices{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-bottom:6px;
}
.choice-btn{
  padding:13px 10px;
  border-radius:12px;
  border:2px solid #2c3156;
  background:#12162a;
  color:var(--text);
  font-size:.95rem;
  cursor:pointer;
  transition:.15s;
  text-align:center;
}
.choice-btn:hover{border-color:var(--accent);}
.choice-btn.correct{border-color:var(--good);background:rgba(61,220,151,.12);}
.choice-btn.wrong{border-color:var(--bad);background:rgba(255,92,108,.12);}
.choice-btn:disabled{cursor:default;}
.btn-row{
  display:flex;
  gap:10px;
  margin-top:20px;
}
.btn{
  flex:1;
  border:none;
  border-radius:12px;
  padding:14px;
  font-size:1rem;
  font-weight:600;
  cursor:pointer;
  transition:transform .1s, opacity .15s;
  font-family:inherit;
}
.btn:active{transform:scale(.97);}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#4a63d6);
  color:#fff;
}
.btn-secondary{
  background:#262c52;
  color:var(--text);
}
.feedback{
  text-align:center;
  margin-top:16px;
  font-size:.95rem;
  min-height:1.2em;
  font-weight:600;
}
.feedback.good{color:var(--good);}
.feedback.bad{color:var(--bad);}
footer.app-footer{
  margin-top:28px;
  color:var(--muted);
  font-size:.75rem;
  text-align:center;
}
.menu-grid{
  width:100%;
  max-width:520px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
.menu-card{
  background:var(--card);
  border-radius:20px;
  padding:22px 16px;
  text-align:center;
  text-decoration:none;
  color:var(--text);
  box-shadow:0 8px 22px rgba(0,0,0,.3);
  transition:transform .12s;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
}
.menu-card:active{transform:scale(.96);}
.menu-card .icon{font-size:2.1rem;}
.menu-card h2{
  margin:0;
  font-size:1.02rem;
}
.menu-card p{
  margin:0;
  font-size:.76rem;
  color:var(--muted);
  line-height:1.3;
}
.menu-card .badge{
  margin-top:2px;
  font-size:.68rem;
  color:var(--accent);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.4px;
}
@media (max-width:360px){
  .menu-grid{grid-template-columns:1fr;}
}